380 Memoirs on the Coleoptera 



Allied to compacta but differing in its more abbreviated form and 

 shorter pro thorax, elytra and beak; the scales of the upper surface 

 are more broadly linear in form and are still denser. 



Trichobaris retrusa n. sp. — Oblong-suboval, moderately convex, black, 

 the vestiture of the upper surface consisting of close-set lineiform scales, 

 which are however much less dense and not so broad as in the preceding, 

 the basal thoracic spots very small; the under surface is nearly as in 

 hrevipennis and compacta, except that the dense scales are less broadly 

 oval; beak in the male feebly arcuate, rather thick, densely squamulose, 

 angularly gibbous above at base and as long as the prothorax, which is 

 formed nearly as in hrevipennis but rather less abbreviated; punctures 

 coarse and close but separately circular and not forming rugulae; elytra 

 not quite one-half longer than wide, parallel, obtusely, evenly rounding 

 in somewhat less than apical third or fourth, wider than the prothorax 

 and evidently, more than twice as long; striae moderate, sometimes 

 clearly indicated by parting of the rather close-set scales, which however 

 are less dense than in any of the other species of the compacta section. 

 Length (c?') 4.6-5.0 mm.; width 1.8-2.2 mm. Arizona (Tugson), — 

 Tucker. Three specimens. 



The vestiture of the three species hrevipennis, compacta and 

 retrusa is of the same character but decreases in density in the order 

 named, being very dense in the first, a little less so in the second and 

 very notably so in retrusa. The prothorax is smaller and shorter 

 than in compacta, but not so abbreviated as in hrevipennis, and the 

 beak of the male is less thick than in either of the other two. 



The species which immediately follows differs from either of the 

 three just mentioned, in having the scales which clothe the feeble 

 abdominal impression of the male as large and dense as those toward 

 the sides : 



Trichobaris utensis n. sp. — Oblong, somewhat convex, black, very 

 closely clothed above with rather broad but lineiform gray scales, the 

 striae only indicated by slight obliquity of the scales along the sides of 

 the intervals, the pronotal spots very small; scales of the under surface 

 dense, oval, fan-shaped on the propleura; beak in the male nearly as 

 long as the head and prothorax, thick, densely squamose and angularly 

 gibbous on the upper surface at base; prothorax a fourth wider than 

 long, the sides rather strongly converging and nearly straight for three- 

 fifths, then rounding and more convergent to the apex; sculpture dense, 

 obscured by the broad linear scales; elytra two-fifths longer than wide, 

 nearly a third wider than the prothorax and two and one-half times as 

 long, parallel, the sides gradually arcuate in posterior two-fifths to the 

 obtusely rounded apex; sculpture concealed by the very close though 

 not contiguous scales; pygidium convex, with long and close, suberect 

 scales above, smaller and sparser beneath; median third of the fifth 



